Accessibility Glossary
WCAG criteria, patterns, and standards — with interactive demos, detection methods, and audit data.
Accessible document formats and the practices that make PDFs, spreadsheets, and office files usable by everyone.
Document Structure
Headings, lists, tables, and reading order must be structurally encoded — not just visually styled. Applies to Word, PowerPoint, InDesign, and Google Docs. Export to tagged PDF.
Email Accessibility
77% failHTML email renders across a fragmented stack — Outlook on Windows uses the Word engine, Gmail strips style blocks, Apple Mail enforces dark-mode color inversion. Build with semantic tables for layout, real text over image-only designs, descriptive alt text, 4.5:1 contrast (in both light and dark), descriptive link text, and a declared language. Most marketing emails fail at least one of these.
PDF Accessibility
72% failTagged PDFs with reading order, alt text, proper structure, and bookmarks. Only 19% of observed tables in PDFs were properly coded. Scan → OCR does not equal accessible.